1588 lines
37 KiB
JavaScript
Executable File
1588 lines
37 KiB
JavaScript
Executable File
//---------------------------------------------------------------------
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//
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// QR Code Generator for JavaScript
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//
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// Copyright (c) 2009 Kazuhiko Arase
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//
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// URL: http://www.d-project.com/
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//
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// Licensed under the MIT license:
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// http://www.opensource.org/licenses/mit-license.php
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//
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// The word 'QR Code' is registered trademark of
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// DENSO WAVE INCORPORATED
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// http://www.denso-wave.com/qrcode/faqpatent-e.html
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//
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//---------------------------------------------------------------------
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//---------------------------------------------------------------------
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// qrcode
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//---------------------------------------------------------------------
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/**
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* qrcode
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* @param typeNumber 1 to 40
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* @param errorCorrectLevel 'L','M','Q','H'
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*/
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var qrcode = function(typeNumber, errorCorrectLevel) {
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var PAD0 = 0xEC;
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var PAD1 = 0x11;
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var _typeNumber = typeNumber;
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var _errorCorrectLevel = QRErrorCorrectLevel[errorCorrectLevel];
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var _modules = null;
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var _moduleCount = 0;
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var _dataCache = null;
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var _dataList = new Array();
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var _this = {};
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var makeImpl = function(test, maskPattern) {
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_moduleCount = _typeNumber * 4 + 17;
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_modules = function(moduleCount) {
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var modules = new Array(moduleCount);
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for (var row = 0; row < moduleCount; row += 1) {
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modules[row] = new Array(moduleCount);
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for (var col = 0; col < moduleCount; col += 1) {
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modules[row][col] = null;
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}
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}
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return modules;
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}(_moduleCount);
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setupPositionProbePattern(0, 0);
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setupPositionProbePattern(_moduleCount - 7, 0);
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setupPositionProbePattern(0, _moduleCount - 7);
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setupPositionAdjustPattern();
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setupTimingPattern();
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setupTypeInfo(test, maskPattern);
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if (_typeNumber >= 7) {
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setupTypeNumber(test);
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}
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if (_dataCache == null) {
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_dataCache = createData(_typeNumber, _errorCorrectLevel, _dataList);
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}
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mapData(_dataCache, maskPattern);
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};
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var setupPositionProbePattern = function(row, col) {
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for (var r = -1; r <= 7; r += 1) {
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if (row + r <= -1 || _moduleCount <= row + r) continue;
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for (var c = -1; c <= 7; c += 1) {
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if (col + c <= -1 || _moduleCount <= col + c) continue;
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if ( (0 <= r && r <= 6 && (c == 0 || c == 6) )
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|| (0 <= c && c <= 6 && (r == 0 || r == 6) )
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|| (2 <= r && r <= 4 && 2 <= c && c <= 4) ) {
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_modules[row + r][col + c] = true;
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} else {
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_modules[row + r][col + c] = false;
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}
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}
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}
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};
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var getBestMaskPattern = function() {
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var minLostPoint = 0;
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var pattern = 0;
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for (var i = 0; i < 8; i += 1) {
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makeImpl(true, i);
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var lostPoint = QRUtil.getLostPoint(_this);
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if (i == 0 || minLostPoint > lostPoint) {
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minLostPoint = lostPoint;
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pattern = i;
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}
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}
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return pattern;
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};
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var setupTimingPattern = function() {
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for (var r = 8; r < _moduleCount - 8; r += 1) {
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if (_modules[r][6] != null) {
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continue;
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}
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_modules[r][6] = (r % 2 == 0);
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}
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for (var c = 8; c < _moduleCount - 8; c += 1) {
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if (_modules[6][c] != null) {
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continue;
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}
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_modules[6][c] = (c % 2 == 0);
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}
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};
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var setupPositionAdjustPattern = function() {
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var pos = QRUtil.getPatternPosition(_typeNumber);
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for (var i = 0; i < pos.length; i += 1) {
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for (var j = 0; j < pos.length; j += 1) {
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var row = pos[i];
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var col = pos[j];
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if (_modules[row][col] != null) {
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continue;
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}
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for (var r = -2; r <= 2; r += 1) {
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for (var c = -2; c <= 2; c += 1) {
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if (r == -2 || r == 2 || c == -2 || c == 2
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|| (r == 0 && c == 0) ) {
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_modules[row + r][col + c] = true;
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} else {
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_modules[row + r][col + c] = false;
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}
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}
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}
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}
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}
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};
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var setupTypeNumber = function(test) {
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var bits = QRUtil.getBCHTypeNumber(_typeNumber);
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for (var i = 0; i < 18; i += 1) {
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var mod = (!test && ( (bits >> i) & 1) == 1);
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_modules[Math.floor(i / 3)][i % 3 + _moduleCount - 8 - 3] = mod;
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}
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for (var i = 0; i < 18; i += 1) {
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var mod = (!test && ( (bits >> i) & 1) == 1);
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_modules[i % 3 + _moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
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}
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};
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var setupTypeInfo = function(test, maskPattern) {
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var data = (_errorCorrectLevel << 3) | maskPattern;
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var bits = QRUtil.getBCHTypeInfo(data);
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// vertical
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for (var i = 0; i < 15; i += 1) {
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var mod = (!test && ( (bits >> i) & 1) == 1);
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if (i < 6) {
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_modules[i][8] = mod;
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} else if (i < 8) {
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_modules[i + 1][8] = mod;
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} else {
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_modules[_moduleCount - 15 + i][8] = mod;
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}
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}
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// horizontal
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for (var i = 0; i < 15; i += 1) {
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var mod = (!test && ( (bits >> i) & 1) == 1);
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if (i < 8) {
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_modules[8][_moduleCount - i - 1] = mod;
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} else if (i < 9) {
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_modules[8][15 - i - 1 + 1] = mod;
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} else {
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_modules[8][15 - i - 1] = mod;
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}
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}
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// fixed module
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_modules[_moduleCount - 8][8] = (!test);
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};
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var mapData = function(data, maskPattern) {
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var inc = -1;
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var row = _moduleCount - 1;
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var bitIndex = 7;
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var byteIndex = 0;
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var maskFunc = QRUtil.getMaskFunction(maskPattern);
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for (var col = _moduleCount - 1; col > 0; col -= 2) {
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if (col == 6) col -= 1;
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while (true) {
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for (var c = 0; c < 2; c += 1) {
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if (_modules[row][col - c] == null) {
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var dark = false;
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if (byteIndex < data.length) {
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dark = ( ( (data[byteIndex] >>> bitIndex) & 1) == 1);
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}
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var mask = maskFunc(row, col - c);
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if (mask) {
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dark = !dark;
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}
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_modules[row][col - c] = dark;
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bitIndex -= 1;
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if (bitIndex == -1) {
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byteIndex += 1;
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bitIndex = 7;
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}
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}
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}
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row += inc;
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if (row < 0 || _moduleCount <= row) {
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row -= inc;
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inc = -inc;
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break;
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}
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}
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}
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};
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var createBytes = function(buffer, rsBlocks) {
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var offset = 0;
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var maxDcCount = 0;
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var maxEcCount = 0;
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var dcdata = new Array(rsBlocks.length);
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var ecdata = new Array(rsBlocks.length);
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for (var r = 0; r < rsBlocks.length; r += 1) {
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var dcCount = rsBlocks[r].dataCount;
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var ecCount = rsBlocks[r].totalCount - dcCount;
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maxDcCount = Math.max(maxDcCount, dcCount);
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maxEcCount = Math.max(maxEcCount, ecCount);
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dcdata[r] = new Array(dcCount);
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for (var i = 0; i < dcdata[r].length; i += 1) {
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dcdata[r][i] = 0xff & buffer.getBuffer()[i + offset];
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}
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offset += dcCount;
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var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
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var rawPoly = qrPolynomial(dcdata[r], rsPoly.getLength() - 1);
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var modPoly = rawPoly.mod(rsPoly);
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ecdata[r] = new Array(rsPoly.getLength() - 1);
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for (var i = 0; i < ecdata[r].length; i += 1) {
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var modIndex = i + modPoly.getLength() - ecdata[r].length;
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ecdata[r][i] = (modIndex >= 0)? modPoly.getAt(modIndex) : 0;
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}
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}
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var totalCodeCount = 0;
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for (var i = 0; i < rsBlocks.length; i += 1) {
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totalCodeCount += rsBlocks[i].totalCount;
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}
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var data = new Array(totalCodeCount);
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var index = 0;
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for (var i = 0; i < maxDcCount; i += 1) {
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for (var r = 0; r < rsBlocks.length; r += 1) {
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if (i < dcdata[r].length) {
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data[index] = dcdata[r][i];
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index += 1;
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}
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}
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}
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for (var i = 0; i < maxEcCount; i += 1) {
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for (var r = 0; r < rsBlocks.length; r += 1) {
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if (i < ecdata[r].length) {
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data[index] = ecdata[r][i];
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index += 1;
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}
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}
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}
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return data;
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};
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var createData = function(typeNumber, errorCorrectLevel, dataList) {
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var rsBlocks = QRRSBlock.getRSBlocks(typeNumber, errorCorrectLevel);
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var buffer = qrBitBuffer();
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for (var i = 0; i < dataList.length; i += 1) {
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var data = dataList[i];
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buffer.put(data.getMode(), 4);
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buffer.put(data.getLength(), QRUtil.getLengthInBits(data.getMode(), typeNumber) );
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data.write(buffer);
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}
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// calc num max data.
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var totalDataCount = 0;
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for (var i = 0; i < rsBlocks.length; i += 1) {
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totalDataCount += rsBlocks[i].dataCount;
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}
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if (buffer.getLengthInBits() > totalDataCount * 8) {
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throw new Error('code length overflow. ('
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+ buffer.getLengthInBits()
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+ '>'
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+ totalDataCount * 8
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+ ')');
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}
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// end code
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if (buffer.getLengthInBits() + 4 <= totalDataCount * 8) {
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buffer.put(0, 4);
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}
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// padding
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while (buffer.getLengthInBits() % 8 != 0) {
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buffer.putBit(false);
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}
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// padding
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while (true) {
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if (buffer.getLengthInBits() >= totalDataCount * 8) {
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break;
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}
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buffer.put(PAD0, 8);
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if (buffer.getLengthInBits() >= totalDataCount * 8) {
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break;
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}
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buffer.put(PAD1, 8);
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}
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return createBytes(buffer, rsBlocks);
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};
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_this.addData = function(data) {
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var newData = qr8BitByte(data);
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_dataList.push(newData);
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_dataCache = null;
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};
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_this.isDark = function(row, col) {
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if (row < 0 || _moduleCount <= row || col < 0 || _moduleCount <= col) {
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throw new Error(row + ',' + col);
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}
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return _modules[row][col];
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};
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_this.getModuleCount = function() {
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return _moduleCount;
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};
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_this.make = function() {
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makeImpl(false, getBestMaskPattern() );
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};
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_this.createTableTag = function(cellSize, margin) {
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cellSize = cellSize || 2;
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margin = (typeof margin == 'undefined')? cellSize * 4 : margin;
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var qrHtml = '';
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qrHtml += '<table style="';
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qrHtml += ' border-width: 0px; border-style: none;';
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qrHtml += ' border-collapse: collapse;';
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qrHtml += ' padding: 0px; margin: ' + margin + 'px;';
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qrHtml += '">';
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qrHtml += '<tbody>';
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for (var r = 0; r < _this.getModuleCount(); r += 1) {
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qrHtml += '<tr>';
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for (var c = 0; c < _this.getModuleCount(); c += 1) {
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qrHtml += '<td style="';
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qrHtml += ' border-width: 0px; border-style: none;';
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qrHtml += ' border-collapse: collapse;';
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qrHtml += ' padding: 0px; margin: 0px;';
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qrHtml += ' width: ' + cellSize + 'px;';
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qrHtml += ' height: ' + cellSize + 'px;';
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qrHtml += ' background-color: ';
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qrHtml += _this.isDark(r, c)? '#000000' : '#ffffff';
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qrHtml += ';';
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qrHtml += '"/>';
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}
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qrHtml += '</tr>';
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}
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qrHtml += '</tbody>';
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qrHtml += '</table>';
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return qrHtml;
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};
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_this.createImgTag = function(cellSize, margin, size) {
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cellSize = cellSize || 2;
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margin = (typeof margin == 'undefined')? cellSize * 4 : margin;
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var min = margin;
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var max = _this.getModuleCount() * cellSize + margin;
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return createImgTag(size, size, function(x, y) {
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if (min <= x && x < max && min <= y && y < max) {
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var c = Math.floor( (x - min) / cellSize);
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var r = Math.floor( (y - min) / cellSize);
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return _this.isDark(r, c)? 0 : 1;
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} else {
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return 1;
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}
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} );
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};
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return _this;
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};
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//---------------------------------------------------------------------
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// qrcode.stringToBytes
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//---------------------------------------------------------------------
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qrcode.stringToBytes = function(s) {
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var bytes = new Array();
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for (var i = 0; i < s.length; i += 1) {
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var c = s.charCodeAt(i);
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bytes.push(c & 0xff);
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}
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return bytes;
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};
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//---------------------------------------------------------------------
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// qrcode.createStringToBytes
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//---------------------------------------------------------------------
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/**
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* @param unicodeData base64 string of byte array.
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* [16bit Unicode],[16bit Bytes], ...
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* @param numChars
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*/
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qrcode.createStringToBytes = function(unicodeData, numChars) {
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// create conversion map.
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var unicodeMap = function() {
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var bin = base64DecodeInputStream(unicodeData);
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var read = function() {
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var b = bin.read();
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if (b == -1) throw new Error();
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return b;
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};
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var count = 0;
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var unicodeMap = {};
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while (true) {
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var b0 = bin.read();
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if (b0 == -1) break;
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var b1 = read();
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var b2 = read();
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var b3 = read();
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var k = String.fromCharCode( (b0 << 8) | b1);
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var v = (b2 << 8) | b3;
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unicodeMap[k] = v;
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count += 1;
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}
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if (count != numChars) {
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throw new Error(count + ' != ' + numChars);
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}
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return unicodeMap;
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}();
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var unknownChar = '?'.charCodeAt(0);
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return function(s) {
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var bytes = new Array();
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for (var i = 0; i < s.length; i += 1) {
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var c = s.charCodeAt(i);
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if (c < 128) {
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bytes.push(c);
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} else {
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var b = unicodeMap[s.charAt(i)];
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if (typeof b == 'number') {
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if ( (b & 0xff) == b) {
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// 1byte
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bytes.push(b);
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} else {
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// 2bytes
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bytes.push(b >>> 8);
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bytes.push(b & 0xff);
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}
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} else {
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bytes.push(unknownChar);
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}
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}
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}
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return bytes;
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};
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};
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//---------------------------------------------------------------------
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// QRMode
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//---------------------------------------------------------------------
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var QRMode = {
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MODE_NUMBER : 1 << 0,
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MODE_ALPHA_NUM : 1 << 1,
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MODE_8BIT_BYTE : 1 << 2,
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MODE_KANJI : 1 << 3
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};
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//---------------------------------------------------------------------
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// QRErrorCorrectLevel
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//---------------------------------------------------------------------
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var QRErrorCorrectLevel = {
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L : 1,
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M : 0,
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Q : 3,
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H : 2
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};
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//---------------------------------------------------------------------
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// QRMaskPattern
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//---------------------------------------------------------------------
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var QRMaskPattern = {
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PATTERN000 : 0,
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PATTERN001 : 1,
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PATTERN010 : 2,
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PATTERN011 : 3,
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PATTERN100 : 4,
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PATTERN101 : 5,
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|
PATTERN110 : 6,
|
|
PATTERN111 : 7
|
|
};
|
|
|
|
//---------------------------------------------------------------------
|
|
// QRUtil
|
|
//---------------------------------------------------------------------
|
|
|
|
var QRUtil = function() {
|
|
|
|
var PATTERN_POSITION_TABLE = [
|
|
[],
|
|
[6, 18],
|
|
[6, 22],
|
|
[6, 26],
|
|
[6, 30],
|
|
[6, 34],
|
|
[6, 22, 38],
|
|
[6, 24, 42],
|
|
[6, 26, 46],
|
|
[6, 28, 50],
|
|
[6, 30, 54],
|
|
[6, 32, 58],
|
|
[6, 34, 62],
|
|
[6, 26, 46, 66],
|
|
[6, 26, 48, 70],
|
|
[6, 26, 50, 74],
|
|
[6, 30, 54, 78],
|
|
[6, 30, 56, 82],
|
|
[6, 30, 58, 86],
|
|
[6, 34, 62, 90],
|
|
[6, 28, 50, 72, 94],
|
|
[6, 26, 50, 74, 98],
|
|
[6, 30, 54, 78, 102],
|
|
[6, 28, 54, 80, 106],
|
|
[6, 32, 58, 84, 110],
|
|
[6, 30, 58, 86, 114],
|
|
[6, 34, 62, 90, 118],
|
|
[6, 26, 50, 74, 98, 122],
|
|
[6, 30, 54, 78, 102, 126],
|
|
[6, 26, 52, 78, 104, 130],
|
|
[6, 30, 56, 82, 108, 134],
|
|
[6, 34, 60, 86, 112, 138],
|
|
[6, 30, 58, 86, 114, 142],
|
|
[6, 34, 62, 90, 118, 146],
|
|
[6, 30, 54, 78, 102, 126, 150],
|
|
[6, 24, 50, 76, 102, 128, 154],
|
|
[6, 28, 54, 80, 106, 132, 158],
|
|
[6, 32, 58, 84, 110, 136, 162],
|
|
[6, 26, 54, 82, 110, 138, 166],
|
|
[6, 30, 58, 86, 114, 142, 170]
|
|
];
|
|
var G15 = (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0);
|
|
var G18 = (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0);
|
|
var G15_MASK = (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1);
|
|
|
|
var _this = {};
|
|
|
|
var getBCHDigit = function(data) {
|
|
var digit = 0;
|
|
while (data != 0) {
|
|
digit += 1;
|
|
data >>>= 1;
|
|
}
|
|
return digit;
|
|
};
|
|
|
|
_this.getBCHTypeInfo = function(data) {
|
|
var d = data << 10;
|
|
while (getBCHDigit(d) - getBCHDigit(G15) >= 0) {
|
|
d ^= (G15 << (getBCHDigit(d) - getBCHDigit(G15) ) );
|
|
}
|
|
return ( (data << 10) | d) ^ G15_MASK;
|
|
};
|
|
|
|
_this.getBCHTypeNumber = function(data) {
|
|
var d = data << 12;
|
|
while (getBCHDigit(d) - getBCHDigit(G18) >= 0) {
|
|
d ^= (G18 << (getBCHDigit(d) - getBCHDigit(G18) ) );
|
|
}
|
|
return (data << 12) | d;
|
|
};
|
|
|
|
_this.getPatternPosition = function(typeNumber) {
|
|
return PATTERN_POSITION_TABLE[typeNumber - 1];
|
|
};
|
|
|
|
_this.getMaskFunction = function(maskPattern) {
|
|
|
|
switch (maskPattern) {
|
|
|
|
case QRMaskPattern.PATTERN000 :
|
|
return function(i, j) { return (i + j) % 2 == 0; };
|
|
case QRMaskPattern.PATTERN001 :
|
|
return function(i, j) { return i % 2 == 0; };
|
|
case QRMaskPattern.PATTERN010 :
|
|
return function(i, j) { return j % 3 == 0; };
|
|
case QRMaskPattern.PATTERN011 :
|
|
return function(i, j) { return (i + j) % 3 == 0; };
|
|
case QRMaskPattern.PATTERN100 :
|
|
return function(i, j) { return (Math.floor(i / 2) + Math.floor(j / 3) ) % 2 == 0; };
|
|
case QRMaskPattern.PATTERN101 :
|
|
return function(i, j) { return (i * j) % 2 + (i * j) % 3 == 0; };
|
|
case QRMaskPattern.PATTERN110 :
|
|
return function(i, j) { return ( (i * j) % 2 + (i * j) % 3) % 2 == 0; };
|
|
case QRMaskPattern.PATTERN111 :
|
|
return function(i, j) { return ( (i * j) % 3 + (i + j) % 2) % 2 == 0; };
|
|
|
|
default :
|
|
throw new Error('bad maskPattern:' + maskPattern);
|
|
}
|
|
};
|
|
|
|
_this.getErrorCorrectPolynomial = function(errorCorrectLength) {
|
|
var a = qrPolynomial([1], 0);
|
|
for (var i = 0; i < errorCorrectLength; i += 1) {
|
|
a = a.multiply(qrPolynomial([1, QRMath.gexp(i)], 0) );
|
|
}
|
|
return a;
|
|
};
|
|
|
|
_this.getLengthInBits = function(mode, type) {
|
|
|
|
if (1 <= type && type < 10) {
|
|
|
|
// 1 - 9
|
|
|
|
switch(mode) {
|
|
case QRMode.MODE_NUMBER : return 10;
|
|
case QRMode.MODE_ALPHA_NUM : return 9;
|
|
case QRMode.MODE_8BIT_BYTE : return 8;
|
|
case QRMode.MODE_KANJI : return 8;
|
|
default :
|
|
throw new Error('mode:' + mode);
|
|
}
|
|
|
|
} else if (type < 27) {
|
|
|
|
// 10 - 26
|
|
|
|
switch(mode) {
|
|
case QRMode.MODE_NUMBER : return 12;
|
|
case QRMode.MODE_ALPHA_NUM : return 11;
|
|
case QRMode.MODE_8BIT_BYTE : return 16;
|
|
case QRMode.MODE_KANJI : return 10;
|
|
default :
|
|
throw new Error('mode:' + mode);
|
|
}
|
|
|
|
} else if (type < 41) {
|
|
|
|
// 27 - 40
|
|
|
|
switch(mode) {
|
|
case QRMode.MODE_NUMBER : return 14;
|
|
case QRMode.MODE_ALPHA_NUM : return 13;
|
|
case QRMode.MODE_8BIT_BYTE : return 16;
|
|
case QRMode.MODE_KANJI : return 12;
|
|
default :
|
|
throw new Error('mode:' + mode);
|
|
}
|
|
|
|
} else {
|
|
throw new Error('type:' + type);
|
|
}
|
|
};
|
|
|
|
_this.getLostPoint = function(qrcode) {
|
|
|
|
var moduleCount = qrcode.getModuleCount();
|
|
|
|
var lostPoint = 0;
|
|
|
|
// LEVEL1
|
|
|
|
for (var row = 0; row < moduleCount; row += 1) {
|
|
for (var col = 0; col < moduleCount; col += 1) {
|
|
|
|
var sameCount = 0;
|
|
var dark = qrcode.isDark(row, col);
|
|
|
|
for (var r = -1; r <= 1; r += 1) {
|
|
|
|
if (row + r < 0 || moduleCount <= row + r) {
|
|
continue;
|
|
}
|
|
|
|
for (var c = -1; c <= 1; c += 1) {
|
|
|
|
if (col + c < 0 || moduleCount <= col + c) {
|
|
continue;
|
|
}
|
|
|
|
if (r == 0 && c == 0) {
|
|
continue;
|
|
}
|
|
|
|
if (dark == qrcode.isDark(row + r, col + c) ) {
|
|
sameCount += 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (sameCount > 5) {
|
|
lostPoint += (3 + sameCount - 5);
|
|
}
|
|
}
|
|
};
|
|
|
|
// LEVEL2
|
|
|
|
for (var row = 0; row < moduleCount - 1; row += 1) {
|
|
for (var col = 0; col < moduleCount - 1; col += 1) {
|
|
var count = 0;
|
|
if (qrcode.isDark(row, col) ) count += 1;
|
|
if (qrcode.isDark(row + 1, col) ) count += 1;
|
|
if (qrcode.isDark(row, col + 1) ) count += 1;
|
|
if (qrcode.isDark(row + 1, col + 1) ) count += 1;
|
|
if (count == 0 || count == 4) {
|
|
lostPoint += 3;
|
|
}
|
|
}
|
|
}
|
|
|
|
// LEVEL3
|
|
|
|
for (var row = 0; row < moduleCount; row += 1) {
|
|
for (var col = 0; col < moduleCount - 6; col += 1) {
|
|
if (qrcode.isDark(row, col)
|
|
&& !qrcode.isDark(row, col + 1)
|
|
&& qrcode.isDark(row, col + 2)
|
|
&& qrcode.isDark(row, col + 3)
|
|
&& qrcode.isDark(row, col + 4)
|
|
&& !qrcode.isDark(row, col + 5)
|
|
&& qrcode.isDark(row, col + 6) ) {
|
|
lostPoint += 40;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (var col = 0; col < moduleCount; col += 1) {
|
|
for (var row = 0; row < moduleCount - 6; row += 1) {
|
|
if (qrcode.isDark(row, col)
|
|
&& !qrcode.isDark(row + 1, col)
|
|
&& qrcode.isDark(row + 2, col)
|
|
&& qrcode.isDark(row + 3, col)
|
|
&& qrcode.isDark(row + 4, col)
|
|
&& !qrcode.isDark(row + 5, col)
|
|
&& qrcode.isDark(row + 6, col) ) {
|
|
lostPoint += 40;
|
|
}
|
|
}
|
|
}
|
|
|
|
// LEVEL4
|
|
|
|
var darkCount = 0;
|
|
|
|
for (var col = 0; col < moduleCount; col += 1) {
|
|
for (var row = 0; row < moduleCount; row += 1) {
|
|
if (qrcode.isDark(row, col) ) {
|
|
darkCount += 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
|
|
lostPoint += ratio * 10;
|
|
|
|
return lostPoint;
|
|
};
|
|
|
|
return _this;
|
|
}();
|
|
|
|
//---------------------------------------------------------------------
|
|
// QRMath
|
|
//---------------------------------------------------------------------
|
|
|
|
var QRMath = function() {
|
|
|
|
var EXP_TABLE = new Array(256);
|
|
var LOG_TABLE = new Array(256);
|
|
|
|
// initialize tables
|
|
for (var i = 0; i < 8; i += 1) {
|
|
EXP_TABLE[i] = 1 << i;
|
|
}
|
|
for (var i = 8; i < 256; i += 1) {
|
|
EXP_TABLE[i] = EXP_TABLE[i - 4]
|
|
^ EXP_TABLE[i - 5]
|
|
^ EXP_TABLE[i - 6]
|
|
^ EXP_TABLE[i - 8];
|
|
}
|
|
for (var i = 0; i < 255; i += 1) {
|
|
LOG_TABLE[EXP_TABLE[i] ] = i;
|
|
}
|
|
|
|
var _this = {};
|
|
|
|
_this.glog = function(n) {
|
|
|
|
if (n < 1) {
|
|
throw new Error('glog(' + n + ')');
|
|
}
|
|
|
|
return LOG_TABLE[n];
|
|
};
|
|
|
|
_this.gexp = function(n) {
|
|
|
|
while (n < 0) {
|
|
n += 255;
|
|
}
|
|
|
|
while (n >= 256) {
|
|
n -= 255;
|
|
}
|
|
|
|
return EXP_TABLE[n];
|
|
};
|
|
|
|
return _this;
|
|
}();
|
|
|
|
//---------------------------------------------------------------------
|
|
// qrPolynomial
|
|
//---------------------------------------------------------------------
|
|
|
|
function qrPolynomial(num, shift) {
|
|
|
|
if (typeof num.length == 'undefined') {
|
|
throw new Error(num.length + '/' + shift);
|
|
}
|
|
|
|
var _num = function() {
|
|
var offset = 0;
|
|
while (offset < num.length && num[offset] == 0) {
|
|
offset += 1;
|
|
}
|
|
var _num = new Array(num.length - offset + shift);
|
|
for (var i = 0; i < num.length - offset; i += 1) {
|
|
_num[i] = num[i + offset];
|
|
}
|
|
return _num;
|
|
}();
|
|
|
|
var _this = {};
|
|
|
|
_this.getAt = function(index) {
|
|
return _num[index];
|
|
};
|
|
|
|
_this.getLength = function() {
|
|
return _num.length;
|
|
};
|
|
|
|
_this.multiply = function(e) {
|
|
|
|
var num = new Array(_this.getLength() + e.getLength() - 1);
|
|
|
|
for (var i = 0; i < _this.getLength(); i += 1) {
|
|
for (var j = 0; j < e.getLength(); j += 1) {
|
|
num[i + j] ^= QRMath.gexp(QRMath.glog(_this.getAt(i) ) + QRMath.glog(e.getAt(j) ) );
|
|
}
|
|
}
|
|
|
|
return qrPolynomial(num, 0);
|
|
};
|
|
|
|
_this.mod = function(e) {
|
|
|
|
if (_this.getLength() - e.getLength() < 0) {
|
|
return _this;
|
|
}
|
|
|
|
var ratio = QRMath.glog(_this.getAt(0) ) - QRMath.glog(e.getAt(0) );
|
|
|
|
var num = new Array(_this.getLength() );
|
|
for (var i = 0; i < _this.getLength(); i += 1) {
|
|
num[i] = _this.getAt(i);
|
|
}
|
|
|
|
for (var i = 0; i < e.getLength(); i += 1) {
|
|
num[i] ^= QRMath.gexp(QRMath.glog(e.getAt(i) ) + ratio);
|
|
}
|
|
|
|
// recursive call
|
|
return qrPolynomial(num, 0).mod(e);
|
|
};
|
|
|
|
return _this;
|
|
};
|
|
|
|
//---------------------------------------------------------------------
|
|
// QRRSBlock
|
|
//---------------------------------------------------------------------
|
|
|
|
var QRRSBlock = function() {
|
|
|
|
|
|
// [1: [L, M, Q, H], ..]
|
|
var RS_BLOCK_TABLE=[[1,26,19],[1,26,16],[1,26,13],[1,26,9],[1,44,34],[1,44,28],[1,44,22],[1,44,16],[1,70,55],[1,70,44],[2,35,17],[2,35,13],[1,100,80],[2,50,32],[2,50,24],[4,25,9],[1,134,108],[2,67,43],[2,33,15,2,34,16],[2,33,11,2,34,12],[2,86,68],[4,43,27],[4,43,19],[4,43,15],[2,98,78],[4,49,31],[2,32,14,4,33,15],[4,39,13,1,40,14],[2,121,97],[2,60,38,2,61,39],[4,40,18,2,41,19],[4,40,14,2,41,15],[2,146,116],[3,58,36,2,59,37],[4,36,16,4,37,17],[4,36,12,4,37,13],[2,86,68,2,87,69],[4,69,43,1,70,44],[6,43,19,2,44,20],[6,43,15,2,44,16],[4,101,81],[1,80,50,4,81,51],[4,50,22,4,51,23],[3,36,12,8,37,13],[2,116,92,2,117,93],[6,58,36,2,59,37],[4,46,20,6,47,21],[7,42,14,4,43,15],[4,133,107],[8,59,37,1,60,38],[8,44,20,4,45,21],[12,33,11,4,34,12],[3,145,115,1,146,116],[4,64,40,5,65,41],[11,36,16,5,37,17],[11,36,12,5,37,13],[5,109,87,1,110,88],[5,65,41,5,66,42],[5,54,24,7,55,25],[11,36,12],[5,122,98,1,123,99],[7,73,45,3,74,46],[15,43,19,2,44,20],[3,45,15,13,46,16],[1,135,107,5,136,108],[10,74,46,1,75,47],[1,50,22,15,51,23],[2,42,14,17,43,15],[5,150,120,1,151,121],[9,69,43,4,70,44],[17,50,22,1,51,23],[2,42,14,19,43,15],[3,141,113,4,142,114],[3,70,44,11,71,45],[17,47,21,4,48,22],[9,39,13,16,40,14],[3,135,107,5,136,108],[3,67,41,13,68,42],[15,54,24,5,55,25],[15,43,15,10,44,16],[4,144,116,4,145,117],[17,68,42],[17,50,22,6,51,23],[19,46,16,6,47,17],[2,139,111,7,140,112],[17,74,46],[7,54,24,16,55,25],[34,37,13],[4,151,121,5,152,122],[4,75,47,14,76,48],[11,54,24,14,55,25],[16,45,15,14,46,16],[6,147,117,4,148,118],[6,73,45,14,74,46],[11,54,24,16,55,25],[30,46,16,2,47,17],[8,132,106,4,133,107],[8,75,47,13,76,48],[7,54,24,22,55,25],[22,45,15,13,46,16],[10,142,114,2,143,115],[19,74,46,4,75,47],[28,50,22,6,51,23],[33,46,16,4,47,17],[8,152,122,4,153,123],[22,73,45,3,74,46],[8,53,23,26,54,24],[12,45,15,28,46,16],[3,147,117,10,148,118],[3,73,45,23,74,46],[4,54,24,31,55,25],[11,45,15,31,46,16],[7,146,116,7,147,117],[21,73,45,7,74,46],[1,53,23,37,54,24],[19,45,15,26,46,16],[5,145,115,10,146,116],[19,75,47,10,76,48],[15,54,24,25,55,25],[23,45,15,25,46,16],[13,145,115,3,146,116],[2,74,46,29,75,47],[42,54,24,1,55,25],[23,45,15,28,46,16],[17,145,115],[10,74,46,23,75,47],[10,54,24,35,55,25],[19,45,15,35,46,16],[17,145,115,1,146,116],[14,74,46,21,75,47],[29,54,24,19,55,25],[11,45,15,46,46,16],[13,145,115,6,146,116],[14,74,46,23,75,47],[44,54,24,7,55,25],[59,46,16,1,47,17],[12,151,121,7,152,122],[12,75,47,26,76,48],[39,54,24,14,55,25],[22,45,15,41,46,16],[6,151,121,14,152,122],[6,75,47,34,76,48],[46,54,24,10,55,25],[2,45,15,64,46,16],[17,152,122,4,153,123],[29,74,46,14,75,47],[49,54,24,10,55,25],[24,45,15,46,46,16],[4,152,122,18,153,123],[13,74,46,32,75,47],[48,54,24,14,55,25],[42,45,15,32,46,16],[20,147,117,4,148,118],[40,75,47,7,76,48],[43,54,24,22,55,25],[10,45,15,67,46,16],[19,148,118,6,149,119],[18,75,47,31,76,48],[34,54,24,34,55,25],[20,45,15,61,46,16]];
|
|
|
|
var qrRSBlock = function(totalCount, dataCount) {
|
|
var _this = {};
|
|
_this.totalCount = totalCount;
|
|
_this.dataCount = dataCount;
|
|
return _this;
|
|
};
|
|
|
|
var _this = {};
|
|
|
|
var getRsBlockTable = function(typeNumber, errorCorrectLevel) {
|
|
|
|
switch(errorCorrectLevel) {
|
|
case QRErrorCorrectLevel.L :
|
|
return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 0];
|
|
case QRErrorCorrectLevel.M :
|
|
return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 1];
|
|
case QRErrorCorrectLevel.Q :
|
|
return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 2];
|
|
case QRErrorCorrectLevel.H :
|
|
return RS_BLOCK_TABLE[(typeNumber - 1) * 4 + 3];
|
|
default :
|
|
return undefined;
|
|
}
|
|
};
|
|
|
|
_this.getRSBlocks = function(typeNumber, errorCorrectLevel) {
|
|
|
|
var rsBlock = getRsBlockTable(typeNumber, errorCorrectLevel);
|
|
|
|
if (typeof rsBlock == 'undefined') {
|
|
throw new Error('bad rs block @ typeNumber:' + typeNumber +
|
|
'/errorCorrectLevel:' + errorCorrectLevel);
|
|
}
|
|
|
|
var length = rsBlock.length / 3;
|
|
|
|
var list = new Array();
|
|
|
|
for (var i = 0; i < length; i += 1) {
|
|
|
|
var count = rsBlock[i * 3 + 0];
|
|
var totalCount = rsBlock[i * 3 + 1];
|
|
var dataCount = rsBlock[i * 3 + 2];
|
|
|
|
for (var j = 0; j < count; j += 1) {
|
|
list.push(qrRSBlock(totalCount, dataCount) );
|
|
}
|
|
}
|
|
|
|
return list;
|
|
};
|
|
|
|
return _this;
|
|
}();
|
|
|
|
//---------------------------------------------------------------------
|
|
// qrBitBuffer
|
|
//---------------------------------------------------------------------
|
|
|
|
var qrBitBuffer = function() {
|
|
|
|
var _buffer = new Array();
|
|
var _length = 0;
|
|
|
|
var _this = {};
|
|
|
|
_this.getBuffer = function() {
|
|
return _buffer;
|
|
};
|
|
|
|
_this.getAt = function(index) {
|
|
var bufIndex = Math.floor(index / 8);
|
|
return ( (_buffer[bufIndex] >>> (7 - index % 8) ) & 1) == 1;
|
|
};
|
|
|
|
_this.put = function(num, length) {
|
|
for (var i = 0; i < length; i += 1) {
|
|
_this.putBit( ( (num >>> (length - i - 1) ) & 1) == 1);
|
|
}
|
|
};
|
|
|
|
_this.getLengthInBits = function() {
|
|
return _length;
|
|
};
|
|
|
|
_this.putBit = function(bit) {
|
|
|
|
var bufIndex = Math.floor(_length / 8);
|
|
if (_buffer.length <= bufIndex) {
|
|
_buffer.push(0);
|
|
}
|
|
|
|
if (bit) {
|
|
_buffer[bufIndex] |= (0x80 >>> (_length % 8) );
|
|
}
|
|
|
|
_length += 1;
|
|
};
|
|
|
|
return _this;
|
|
};
|
|
|
|
//---------------------------------------------------------------------
|
|
// qr8BitByte
|
|
//---------------------------------------------------------------------
|
|
|
|
var qr8BitByte = function(data) {
|
|
|
|
var _mode = QRMode.MODE_8BIT_BYTE;
|
|
var _data = data;
|
|
var _parsedData = [];
|
|
|
|
var _this = {};
|
|
|
|
|
|
// Added to support UTF-8 Characters
|
|
for (var i = 0, l = _data.length; i < l; i++) {
|
|
var byteArray = [];
|
|
var code = _data.charCodeAt(i);
|
|
|
|
if (code > 0x10000) {
|
|
byteArray[0] = 0xF0 | ((code & 0x1C0000) >>> 18);
|
|
byteArray[1] = 0x80 | ((code & 0x3F000) >>> 12);
|
|
byteArray[2] = 0x80 | ((code & 0xFC0) >>> 6);
|
|
byteArray[3] = 0x80 | (code & 0x3F);
|
|
} else if (code > 0x800) {
|
|
byteArray[0] = 0xE0 | ((code & 0xF000) >>> 12);
|
|
byteArray[1] = 0x80 | ((code & 0xFC0) >>> 6);
|
|
byteArray[2] = 0x80 | (code & 0x3F);
|
|
} else if (code > 0x80) {
|
|
byteArray[0] = 0xC0 | ((code & 0x7C0) >>> 6);
|
|
byteArray[1] = 0x80 | (code & 0x3F);
|
|
} else {
|
|
byteArray[0] = code;
|
|
}
|
|
|
|
// Fix Unicode corruption bug
|
|
_parsedData.push(byteArray);
|
|
}
|
|
|
|
_parsedData = Array.prototype.concat.apply([], _parsedData);
|
|
|
|
if (_parsedData.length != _data.length) {
|
|
_parsedData.unshift(191);
|
|
_parsedData.unshift(187);
|
|
_parsedData.unshift(239);
|
|
}
|
|
|
|
var _bytes = _parsedData;
|
|
|
|
_this.getMode = function() {
|
|
return _mode;
|
|
};
|
|
|
|
_this.getLength = function(buffer) {
|
|
return _bytes.length;
|
|
};
|
|
|
|
_this.write = function(buffer) {
|
|
for (var i = 0; i < _bytes.length; i += 1) {
|
|
buffer.put(_bytes[i], 8);
|
|
}
|
|
};
|
|
|
|
return _this;
|
|
};
|
|
|
|
//=====================================================================
|
|
// GIF Support etc.
|
|
//
|
|
|
|
//---------------------------------------------------------------------
|
|
// byteArrayOutputStream
|
|
//---------------------------------------------------------------------
|
|
|
|
var byteArrayOutputStream = function() {
|
|
|
|
var _bytes = new Array();
|
|
|
|
var _this = {};
|
|
|
|
_this.writeByte = function(b) {
|
|
_bytes.push(b & 0xff);
|
|
};
|
|
|
|
_this.writeShort = function(i) {
|
|
_this.writeByte(i);
|
|
_this.writeByte(i >>> 8);
|
|
};
|
|
|
|
_this.writeBytes = function(b, off, len) {
|
|
off = off || 0;
|
|
len = len || b.length;
|
|
for (var i = 0; i < len; i += 1) {
|
|
_this.writeByte(b[i + off]);
|
|
}
|
|
};
|
|
|
|
_this.writeString = function(s) {
|
|
for (var i = 0; i < s.length; i += 1) {
|
|
_this.writeByte(s.charCodeAt(i) );
|
|
}
|
|
};
|
|
|
|
_this.toByteArray = function() {
|
|
return _bytes;
|
|
};
|
|
|
|
_this.toString = function() {
|
|
var s = '';
|
|
s += '[';
|
|
for (var i = 0; i < _bytes.length; i += 1) {
|
|
if (i > 0) {
|
|
s += ',';
|
|
}
|
|
s += _bytes[i];
|
|
}
|
|
s += ']';
|
|
return s;
|
|
};
|
|
|
|
return _this;
|
|
};
|
|
|
|
//---------------------------------------------------------------------
|
|
// base64EncodeOutputStream
|
|
//---------------------------------------------------------------------
|
|
|
|
var base64EncodeOutputStream = function() {
|
|
|
|
var _buffer = 0;
|
|
var _buflen = 0;
|
|
var _length = 0;
|
|
var _base64 = '';
|
|
|
|
var _this = {};
|
|
|
|
var writeEncoded = function(b) {
|
|
_base64 += String.fromCharCode(encode(b & 0x3f) );
|
|
};
|
|
|
|
var encode = function(n) {
|
|
if (n < 0) {
|
|
// error.
|
|
} else if (n < 26) {
|
|
return 0x41 + n;
|
|
} else if (n < 52) {
|
|
return 0x61 + (n - 26);
|
|
} else if (n < 62) {
|
|
return 0x30 + (n - 52);
|
|
} else if (n == 62) {
|
|
return 0x2b;
|
|
} else if (n == 63) {
|
|
return 0x2f;
|
|
}
|
|
throw new Error('n:' + n);
|
|
};
|
|
|
|
_this.writeByte = function(n) {
|
|
|
|
_buffer = (_buffer << 8) | (n & 0xff);
|
|
_buflen += 8;
|
|
_length += 1;
|
|
|
|
while (_buflen >= 6) {
|
|
writeEncoded(_buffer >>> (_buflen - 6) );
|
|
_buflen -= 6;
|
|
}
|
|
};
|
|
|
|
_this.flush = function() {
|
|
|
|
if (_buflen > 0) {
|
|
writeEncoded(_buffer << (6 - _buflen) );
|
|
_buffer = 0;
|
|
_buflen = 0;
|
|
}
|
|
|
|
if (_length % 3 != 0) {
|
|
// padding
|
|
var padlen = 3 - _length % 3;
|
|
for (var i = 0; i < padlen; i += 1) {
|
|
_base64 += '=';
|
|
}
|
|
}
|
|
};
|
|
|
|
_this.toString = function() {
|
|
return _base64;
|
|
};
|
|
|
|
return _this;
|
|
};
|
|
|
|
//---------------------------------------------------------------------
|
|
// base64DecodeInputStream
|
|
//---------------------------------------------------------------------
|
|
|
|
var base64DecodeInputStream = function(str) {
|
|
|
|
var _str = str;
|
|
var _pos = 0;
|
|
var _buffer = 0;
|
|
var _buflen = 0;
|
|
|
|
var _this = {};
|
|
|
|
_this.read = function() {
|
|
|
|
while (_buflen < 8) {
|
|
|
|
if (_pos >= _str.length) {
|
|
if (_buflen == 0) {
|
|
return -1;
|
|
}
|
|
throw new Error('unexpected end of file./' + _buflen);
|
|
}
|
|
|
|
var c = _str.charAt(_pos);
|
|
_pos += 1;
|
|
|
|
if (c == '=') {
|
|
_buflen = 0;
|
|
return -1;
|
|
} else if (c.match(/^\s$/) ) {
|
|
// ignore if whitespace.
|
|
continue;
|
|
}
|
|
|
|
_buffer = (_buffer << 6) | decode(c.charCodeAt(0) );
|
|
_buflen += 6;
|
|
}
|
|
|
|
var n = (_buffer >>> (_buflen - 8) ) & 0xff;
|
|
_buflen -= 8;
|
|
return n;
|
|
};
|
|
|
|
var decode = function(c) {
|
|
if (0x41 <= c && c <= 0x5a) {
|
|
return c - 0x41;
|
|
} else if (0x61 <= c && c <= 0x7a) {
|
|
return c - 0x61 + 26;
|
|
} else if (0x30 <= c && c <= 0x39) {
|
|
return c - 0x30 + 52;
|
|
} else if (c == 0x2b) {
|
|
return 62;
|
|
} else if (c == 0x2f) {
|
|
return 63;
|
|
} else {
|
|
throw new Error('c:' + c);
|
|
}
|
|
};
|
|
|
|
return _this;
|
|
};
|
|
|
|
//---------------------------------------------------------------------
|
|
// gifImage (B/W)
|
|
//---------------------------------------------------------------------
|
|
|
|
var gifImage = function(width, height) {
|
|
|
|
var _width = width;
|
|
var _height = height;
|
|
var _data = new Array(width * height);
|
|
|
|
var _this = {};
|
|
|
|
_this.setPixel = function(x, y, pixel) {
|
|
_data[y * _width + x] = pixel;
|
|
};
|
|
|
|
_this.write = function(out) {
|
|
|
|
//---------------------------------
|
|
// GIF Signature
|
|
|
|
out.writeString('GIF87a');
|
|
|
|
//---------------------------------
|
|
// Screen Descriptor
|
|
|
|
out.writeShort(_width);
|
|
out.writeShort(_height);
|
|
|
|
out.writeByte(0x80); // 2bit
|
|
out.writeByte(0);
|
|
out.writeByte(0);
|
|
|
|
//---------------------------------
|
|
// Global Color Map
|
|
|
|
// black
|
|
out.writeByte(0x00);
|
|
out.writeByte(0x00);
|
|
out.writeByte(0x00);
|
|
|
|
// white
|
|
out.writeByte(0xff);
|
|
out.writeByte(0xff);
|
|
out.writeByte(0xff);
|
|
|
|
//---------------------------------
|
|
// Image Descriptor
|
|
|
|
out.writeString(',');
|
|
out.writeShort(0);
|
|
out.writeShort(0);
|
|
out.writeShort(_width);
|
|
out.writeShort(_height);
|
|
out.writeByte(0);
|
|
|
|
//---------------------------------
|
|
// Local Color Map
|
|
|
|
//---------------------------------
|
|
// Raster Data
|
|
|
|
var lzwMinCodeSize = 2;
|
|
var raster = getLZWRaster(lzwMinCodeSize);
|
|
|
|
out.writeByte(lzwMinCodeSize);
|
|
|
|
var offset = 0;
|
|
|
|
while (raster.length - offset > 255) {
|
|
out.writeByte(255);
|
|
out.writeBytes(raster, offset, 255);
|
|
offset += 255;
|
|
}
|
|
|
|
out.writeByte(raster.length - offset);
|
|
out.writeBytes(raster, offset, raster.length - offset);
|
|
out.writeByte(0x00);
|
|
|
|
//---------------------------------
|
|
// GIF Terminator
|
|
out.writeString(';');
|
|
};
|
|
|
|
var bitOutputStream = function(out) {
|
|
|
|
var _out = out;
|
|
var _bitLength = 0;
|
|
var _bitBuffer = 0;
|
|
|
|
var _this = {};
|
|
|
|
_this.write = function(data, length) {
|
|
|
|
if ( (data >>> length) != 0) {
|
|
throw new Error('length over');
|
|
}
|
|
|
|
while (_bitLength + length >= 8) {
|
|
_out.writeByte(0xff & ( (data << _bitLength) | _bitBuffer) );
|
|
length -= (8 - _bitLength);
|
|
data >>>= (8 - _bitLength);
|
|
_bitBuffer = 0;
|
|
_bitLength = 0;
|
|
}
|
|
|
|
_bitBuffer = (data << _bitLength) | _bitBuffer;
|
|
_bitLength = _bitLength + length;
|
|
};
|
|
|
|
_this.flush = function() {
|
|
if (_bitLength > 0) {
|
|
_out.writeByte(_bitBuffer);
|
|
}
|
|
};
|
|
|
|
return _this;
|
|
};
|
|
|
|
var getLZWRaster = function(lzwMinCodeSize) {
|
|
|
|
var clearCode = 1 << lzwMinCodeSize;
|
|
var endCode = (1 << lzwMinCodeSize) + 1;
|
|
var bitLength = lzwMinCodeSize + 1;
|
|
|
|
// Setup LZWTable
|
|
var table = lzwTable();
|
|
|
|
for (var i = 0; i < clearCode; i += 1) {
|
|
table.add(String.fromCharCode(i) );
|
|
}
|
|
table.add(String.fromCharCode(clearCode) );
|
|
table.add(String.fromCharCode(endCode) );
|
|
|
|
var byteOut = byteArrayOutputStream();
|
|
var bitOut = bitOutputStream(byteOut);
|
|
|
|
// clear code
|
|
bitOut.write(clearCode, bitLength);
|
|
|
|
var dataIndex = 0;
|
|
|
|
var s = String.fromCharCode(_data[dataIndex]);
|
|
dataIndex += 1;
|
|
|
|
while (dataIndex < _data.length) {
|
|
|
|
var c = String.fromCharCode(_data[dataIndex]);
|
|
dataIndex += 1;
|
|
|
|
if (table.contains(s + c) ) {
|
|
|
|
s = s + c;
|
|
|
|
} else {
|
|
|
|
bitOut.write(table.indexOf(s), bitLength);
|
|
|
|
if (table.size() < 0xfff) {
|
|
|
|
if (table.size() == (1 << bitLength) ) {
|
|
bitLength += 1;
|
|
}
|
|
|
|
table.add(s + c);
|
|
}
|
|
|
|
s = c;
|
|
}
|
|
}
|
|
|
|
bitOut.write(table.indexOf(s), bitLength);
|
|
|
|
// end code
|
|
bitOut.write(endCode, bitLength);
|
|
|
|
bitOut.flush();
|
|
|
|
return byteOut.toByteArray();
|
|
};
|
|
|
|
var lzwTable = function() {
|
|
|
|
var _map = {};
|
|
var _size = 0;
|
|
|
|
var _this = {};
|
|
|
|
_this.add = function(key) {
|
|
if (_this.contains(key) ) {
|
|
throw new Error('dup key:' + key);
|
|
}
|
|
_map[key] = _size;
|
|
_size += 1;
|
|
};
|
|
|
|
_this.size = function() {
|
|
return _size;
|
|
};
|
|
|
|
_this.indexOf = function(key) {
|
|
return _map[key];
|
|
};
|
|
|
|
_this.contains = function(key) {
|
|
return typeof _map[key] != 'undefined';
|
|
};
|
|
|
|
return _this;
|
|
};
|
|
|
|
return _this;
|
|
};
|
|
|
|
var createImgTag = function(width, height, getPixel, alt) {
|
|
|
|
var gif = gifImage(width, height);
|
|
for (var y = 0; y < height; y += 1) {
|
|
for (var x = 0; x < width; x += 1) {
|
|
gif.setPixel(x, y, getPixel(x, y) );
|
|
}
|
|
}
|
|
|
|
var b = byteArrayOutputStream();
|
|
gif.write(b);
|
|
|
|
var base64 = base64EncodeOutputStream();
|
|
var bytes = b.toByteArray();
|
|
for (var i = 0; i < bytes.length; i += 1) {
|
|
base64.writeByte(bytes[i]);
|
|
}
|
|
base64.flush();
|
|
|
|
var img = '';
|
|
img += 'data:image/gif;base64,';
|
|
img += base64;
|
|
|
|
return img;
|
|
};
|
|
|
|
//---------------------------------------------------------------------
|
|
// returns qrcode function.
|
|
|
|
module.exports = qrcode;
|